Calculate secular termRsReinstating the proportionality factor to theconstant term above, the secular part of thedisturbing function isRs=-J2μR2♁2a3(1-e2)3/232sin2i-1.Note that it depends only ona,e, andi.Wewill now study the influence the secular termhas on the elements by using the LPE.The dominant secular effect comes from theJ2term, so this is a reasonable simplification.L. Healy – ENAE404 – Spring 2007 – Lecture 28 (May 8)4